As the title suggests, after updating today to the latest version of Windows 10 (October Update, 1809), I cannot change the brightness levels after waking the computer from sleep. The brightness remains constant. Only a restart fixes the problem.

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We would like to find out if this will do the same thing when using the Microsoft Basic Display adapter, to see if this is even related to the Display adapter. We would have to uninstall and delete the driver through this steps: https://docs.microsoft.com/en-us/windows-hardware/drivers/install/using-device-manager-to-uninstall-... . Once removed from Device Manager, click on "Action", then select "Scan For Hardware changes". This should somehow install a Microsoft basic driver. Check if the issue would still occur.

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My yoga 920's screen brightness is not working after sleep or when the laptop is in an ideal state for too long. The only solution is to uninstall and then reinstall the driver. Need some permanent fix for this at the earliest.

I'm experiencing the same issue. Most of the time I am unable to adjust brightness after ugrading to October 2018 Update. Reinstalling the driver temporarily fixes the issue but then it usually happens again after another sleep/resume cycle. There are no available updates in Lenovo Vantage - I keep checking often.